Patents by Inventor Katsuyuki Murai
Katsuyuki Murai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230161090Abstract: An object of the present invention is to provide an eyewear such as polarized sunglasses using an optical film including a light reflective layer and a polarizing element layer, the eyewear having a metallic color tone conforming to signal visibility standards of various countries, and an optical film and an optical laminate for the eyewear. The present invention provides an optical film obtained by laminating a light reflective layer and a polarizing element layer, in which the optical film satisfies one or more of conditions (a) to (d).Type: ApplicationFiled: April 2, 2021Publication date: May 25, 2023Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Yoshiyuki YAHAGI, Saki HOSHINO, Yuki AIKAWA, Katsuyuki MURAI, Kyousuke NAKAMURA, Aya SAKAJIRI, Masashi KANEDA
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Patent number: 11409025Abstract: Provided is a functional polyamide sheet in which air bubbles are not generated or are reduced in a polarizing and/or photochromic functional sheet when the polarizing and/or photochromic functional sheet are/is manufactured using a sheet or film formed by a polyamide resin as a protective layer, and a functional polyamide lens using the functional polyamide sheet. Provided are a polyamide functional sheet obtained by disposing a protective layer formed by a transparent plastic sheet or film on at least one surface of a functional layer, which is a polyvinyl alcohol-based polarizing film layer, a photochromic layer, or a combination of these layers, with an adhesive layer being interposed therebetween, in which the protective layer is a sheet or film formed by a polyamide resin, and an oxygen transmission rate at 23° C. and 85% RH is 50 cm3/m2·24 hr·bar or more, and a functional polyamide lens using the polyamide functional sheet.Type: GrantFiled: July 5, 2018Date of Patent: August 9, 2022Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Hideaki Kimura, Masayuki Akaki, Kenta Nonaka, Takashi Fujii, Katsuyuki Murai, Shotaro Ohno
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Patent number: 11306242Abstract: A degradation agent for viscous fluids to be used in hydraulic fracturing methods is provided according to one aspect of the present invention, the degradation agent comprising a persulfate and an iron salt serving as an activator for the persulfate, wherein the persulfate and the iron salt have been coated and the ratio of the coating-film thickness (Y) in the iron salt to the coating-film thickness (X) in the persulfate, Y/X, is in the range of 0.35 to 1.0. The degradation agent for viscous fluids has properties suitable for use in hydraulic fracturing methods.Type: GrantFiled: August 1, 2019Date of Patent: April 19, 2022Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Norifumi Tashiro, Katsuyuki Murai
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Publication number: 20210261856Abstract: A degradation agent for viscous fluids to be used in hydraulic fracturing methods is provided according to one aspect of the present invention, the degradation agent comprising a persulfate and an iron salt serving as an activator for the persulfate, wherein the persulfate and the iron salt have been coated and the ratio of the coating-film thickness (Y) in the iron salt to the coating-film thickness (X) in the persulfate, Y/X, is in the range of 0.35 to 1.0. The degradation agent for viscous fluids has properties suitable for use in hydraulic fracturing methods.Type: ApplicationFiled: August 1, 2019Publication date: August 26, 2021Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Norifumi TASHIRO, Katsuyuki MURAI
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Patent number: 10737471Abstract: According to the present invention, a synthetic resin laminate comprising two transparent synthetic resin layers (A), two or more functional layers (B) having photochromic properties interposed between the two synthetic resin layers (A), and a transparent resin layer (C) interposed between the two or more functional layers (B), wherein the functional layer (B) is a cured layer comprising a photochromic dye and obtained from a diisocyanate and a polyol can be provided.Type: GrantFiled: March 7, 2017Date of Patent: August 11, 2020Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Katsuyuki Murai, Kyousuke Nakamura, Hideaki Kimura
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Publication number: 20200174159Abstract: Provided is a functional polyamide sheet in which air bubbles are not generated or are reduced in a polarizing and/or photochromic functional sheet when the polarizing and/or photochromic functional sheet are/is manufactured using a sheet or film formed by a polyamide resin as a protective layer, and a functional polyamide lens using the functional polyamide sheet. Provided are a polyamide functional sheet obtained by disposing a protective layer formed by a transparent plastic sheet or film on at least one surface of a functional layer, which is a polyvinyl alcohol-based polarizing film layer, a photochromic layer, or a combination of these layers, with an adhesive layer being interposed therebetween, in which the protective layer is a sheet or film formed by a polyamide resin, and an oxygen transmission rate at 23° C. and 85% RH is 50 cm3/m2·24 hr·bar or more, and a functional polyamide lens using the polyamide functional sheet.Type: ApplicationFiled: July 5, 2018Publication date: June 4, 2020Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Hideaki KIMURA, Masayuki AKAKI, Kenta NONAKA, Takashi FUJII, Katsuyuki MURAI, Shotaro OHNO
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Publication number: 20190084278Abstract: According to the present invention, a synthetic resin laminate comprising two transparent synthetic resin layers (A), two or more functional layers (B) having photochromic properties interposed between the two synthetic resin layers (A), and a transparent resin layer (C) interposed between the two or more functional layers (B), wherein the functional layer (B) is a cured layer comprising a photochromic dye and obtained from a diisocyanate and a polyol can be provided.Type: ApplicationFiled: March 7, 2017Publication date: March 21, 2019Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Katsuyuki MURAI, Kyousuke NAKAMURA, Hideaki KIMURA
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Patent number: 10120206Abstract: [Problem] The present invention provides eyewear, such as polarized sunglasses, having cholesteric liquid crystal layers, wherein the eyewear has a metallic tone and antiglare properties, minimizes the reduction in light-polarizing element absorptive capability that is associated with circular polarization, and is moreover unaffected by external degrading factors such as sebum, moisture, and salt air. [Solution] This optical film is characterized by being provided with a light-reflecting layer R comprising a cholesteric liquid crystal layer that has right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer that has left-handed helical orientation, and a polarizing element layer.Type: GrantFiled: June 23, 2015Date of Patent: November 6, 2018Assignees: NIPPON KAYAKU KABUSHIKI KAISHA, MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Kouichi Tanaka, Yoshiyuki Yahagi, Hideyoshi Fujisawa, Takuya Gotou, Katsuyuki Murai, Kazuhisa Mitsuhata, Kyousuke Nakamura
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Patent number: 9969839Abstract: In a resin film configured to have a cured product layer formed from a curable resin composition on the surface of a substrate, the present invention aims to ensure not only the processability and other properties of the resin, but also the performance required for recent high-hardness coating films. The above problem was solved by a curable resin composition comprising the intended polyfunctional urethane (meth)acrylate oligomer, which is capable of forming a cured product layer when applied to and cured on a resin substrate.Type: GrantFiled: November 18, 2014Date of Patent: May 15, 2018Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Humiaki Kakeya, Takahiro Matsumoto, Katsuyuki Murai, Tetsuji Moroiwa, Yasuhiro Maeda
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Publication number: 20170160566Abstract: [Problem] The present invention provides eyewear, such as polarized sunglasses, having cholesteric liquid crystal layers, wherein the eyewear has a metallic tone and antiglare properties, minimizes the reduction in light-polarizing element absorptive capability that is associated with circular polarization, and is moreover unaffected by external degrading factors such as sebum, moisture, and salt air. [Solution] This optical film is characterized by being provided with a light-reflecting layer R comprising a cholesteric liquid crystal layer that has right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer that has left-handed helical orientation, and a polarizing element layer.Type: ApplicationFiled: June 23, 2015Publication date: June 8, 2017Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Kouichi TANAKA, Yoshiyuki YAHAGI, Hideyoshi FUJISAWA, Takuya GOTOU, Katsuyuki MURAI, Kazuhisa MITSUHATA, Kyousuke NAKAMURA
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Publication number: 20160297920Abstract: In a resin film configured to have a cured product layer formed from a curable resin composition on the surface of a substrate, the present invention aims to ensure not only the processability and other properties of the resin, but also the performance required for recent high-hardness coating films. The above problem was solved by a curable resin composition comprising the intended polyfunctional urethane (meth)acrylate oligomer, which is capable of forming a cured product layer when applied to and cured on a resin substrate.Type: ApplicationFiled: November 18, 2014Publication date: October 13, 2016Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Humiaki KAKEYA, Takahiro MATSUMOTO, Katsuyuki MURAI, Tetsuji MOROIWA, Yasuhiro MAEDA
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Publication number: 20130183537Abstract: The invention provides a synthetic resin laminate having a thermoplastic resin (A) layer and a thermoplastic resin (B) layer provided on each side of the thermoplastic resin (A) layer, the thermoplastic resin (A) having a styrene structural unit content of 65 to 90 mol % with respect to all the structural units forming the resin, characterized in that the thermoplastic resin (B) is a (meth)acrylic acid ester-styrene copolymer resin which is predominantly formed of a (meth)acrylic acid ester structural unit (a) represented by formula (1) and a styrene structural unit, and which has a ratio by mole of (meth)acrylic acid ester structural unit (a) to styrene structural unit of 70:30 to 84:16. The synthetic resin laminate is excellent in transparency, anti-warpage property, interlayer adhesion, adhesion to a hard coat layer formed from a photosensitive hard coating material, scratch resistance, and weather resistance.Type: ApplicationFiled: August 22, 2011Publication date: July 18, 2013Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Kazuya Sato, Katsuyuki Murai, Nobuyuki Koike, Hiroki Oguro
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Patent number: 7567381Abstract: A highly diffusing plastic sheet having a thickness of from 1 to 5 mm, a haze of 80% or more and a total light transmittance of 80% or more, which includes at least one diffuser layer A, two or more diffuser layers B, and optionally a diffusing agent-free layer C. The diffuser layer A is formed from a first matrix plastic and a first light-diffusing fine particle having an average particle size of from 2 to 6 ?m and a refractive index of from X?0.02 to X+0.02 wherein X is a refractive index of the first matrix plastic. The diffuser layer B is formed from a second matrix plastic and a second light-diffusing fine particle having an average particle size of from 10 to 18 ?m and a refractive index of from Y?0.03 to Y+0.03 wherein Y is a refractive index of the second matrix plastic.Type: GrantFiled: December 19, 2005Date of Patent: July 28, 2009Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Yukio Kokuzawa, Katsuyuki Murai, Shinpei Arita
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Patent number: 7369311Abstract: A lens sheet for use as a Fresnel lens sheet or a lenticular lens sheet of rear projection screens, which includes a plastic substrate and a lens element disposed on the plastic substrate. The plastic substrate includes at least a first surface layer, an intermediate layer and a second surface layer. Each of the first surface layer and the second surface layer has a saturated water absorptivity higher than that of the intermediate layer.Type: GrantFiled: April 12, 2005Date of Patent: May 6, 2008Assignees: Mitsubishi Gas Chemical Company Inc., Japan Acryace Corporation, Arisawa MFG. Co., Ltd.Inventors: Yukio Kokuzawa, Katsuyuki Murai, Shinpei Arita
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Publication number: 20080102230Abstract: A transmissive screen includes a diffusing plate 7 having two first diffusing layers 13 and 15, to which diffusing particles are added respectively, arranged with a second diffusing layer 14, to which diffusing particles whose particle size is smaller than that of the first diffusing layers 13 and 15 are added, in between. Accordingly, even in the case where a diameter of a projection pupil of a projection lens that projects light onto the transmissive screen is small, an image glaring when displaying a bright image can be controlled, while minimizing deterioration of gain, resolution and uniformity.Type: ApplicationFiled: June 13, 2006Publication date: May 1, 2008Inventors: Satoru Murata, Takaaki Iwaki, Yasuaki Nakanishi, Toshiya Kono, Yukio Kokuzawa, Katsuyuki Murai
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Patent number: 7196845Abstract: A Fresnel lens sheet comprising a Fresnel lens substrate and a Fresnel lens, whose surface of the light source side has an average pitch of 200 ?m or smaller and ten point roughness of 3 to 15 ?m, a rear projection screen obtained by assembling the Fresnel lens sheet and a lenticular lens sheet, and a process for producing these. With the use of the Fresnel lens sheet and the rear projection screen in accordance with the present invention, a labyrinth light inside the screen and a surface reflection are diffused effectively and a ghost caused by them is remarkably reduced. Accordingly, the rear projection television employing the Fresnel lens sheet and the rear projection screen of the present invention provides excellent images without ghost light.Type: GrantFiled: February 18, 2004Date of Patent: March 27, 2007Assignees: Mitsubishi Gas Chemical Company, Inc., Japan Acryace CorporationInventors: Yukio Kokuzawa, Katsuyuki Murai, Mitsuhiro Akiyama
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Publication number: 20060134434Abstract: A highly diffusing plastic sheet having a thickness of from 1 to 5 mm, a haze of 80% or more and a total light transmittance of 80% or more, which includes at least one diffuser layer A, two or more diffuser layers B, and optionally a diffusing agent-free layer C. The diffuser layer A is formed from a first matrix plastic and a first light-diffusing fine particle having an average particle size of from 2 to 6 ?m and a refractive index of from X?0.02 to X+0.02 wherein X is a refractive index of the first matrix plastic. The diffuser layer B is formed from a second matrix plastic and a second light-diffusing fine particle having an average particle size of from 10 to 18 ?m and a refractive index of from Y?0.03 to Y+0.03 wherein Y is a refractive index of the second matrix plastic.Type: ApplicationFiled: December 19, 2005Publication date: June 22, 2006Inventors: Yukio Kokuzawa, Katsuyuki Murai, Shinpei Arita
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Publication number: 20050225856Abstract: A lens sheet for use as a Fresnel lens sheet or a lenticular lens sheet of rear projection screens, which includes a plastic substrate and a lens element disposed on the plastic substrate. The plastic substrate includes at least a first surface layer, an intermediate layer and a second surface layer. Each of the first surface layer and the second surface layer has a saturated water absorptivity higher than that of the intermediate layer.Type: ApplicationFiled: April 12, 2005Publication date: October 13, 2005Inventors: Yukio Kokuzawa, Katsuyuki Murai, Shinpei Arita
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Publication number: 20040227991Abstract: A Fresnel lens sheet comprising a Fresnel lens substrate and a Fresnel lens, whose surface of the light source side has an average pitch of 200 &mgr;m or smaller and ten point roughness of 3 to 15 &mgr;m, a rear projection screen obtained by assembling the Fresnel lens sheet and a lenticular lens sheet, and a process for producing these. With the use of the Fresnel lens sheet and the rear projection screen in accordance with the present invention, a labyrinth light inside the screen and a surface reflection are diffused effectively and a ghost caused by them is remarkably reduced. Accordingly, the rear projection television employing the Fresnel lens sheet and the rear projection screen of the present invention provides excellent images without ghost light.Type: ApplicationFiled: February 18, 2004Publication date: November 18, 2004Inventors: Yukio Kokuzawa, Katsuyuki Murai, Mitsuhiro Akiyama
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Patent number: 5955180Abstract: The invention relates to a multi-layer film comprising a layer (A) made of a polyamide (a), a layer (B) made of a mixed polyamide (b.sub.3) of a polyamide (b.sub.1) and an aliphatic polyamide (b.sub.2), a layer (C) made of an adhesive polyolefin (c.sub.1) or a mixed resin (c.sub.3) of an adhesive polyolefin (c.sub.1) and a polyolefin (c.sub.2), and a layer (D) made of a polyolefin (d), whereinthe layer constitution is such that the layers are arranged in order of the layer (A)/the layer (B)/the layer (C)/the layer (D), andthe layer (B) is made of a mixed polyamide (b.sub.3) made up of 60 to 95% by weight of a polyamide (b.sub.1) obtained from a diamine comprising 70 mol % or more of meta-xylylenediamine and a dicarboxyic acid comprising 70 mol % or more of an .alpha.,.omega.-aliphatic dicarboxylic acid having 6 to 12 carbon atoms and 40 to 5% by weight of an aliphatic polyamide (b.sub.2) having a semicrystallization time of 30 sec or less at 160.degree. C. and a solubility parameter (SP value) of 13.+-.1.5.Type: GrantFiled: October 23, 1997Date of Patent: September 21, 1999Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Masahiro Harada, Makoto Takahashi, Katsuya Maruyama, Katsuyuki Murai